# 2025 Canberra Tennis International – Men's singles

Dominik Koepfer was the defending champion but lost in the first round to Harold Mayot.
João Fonseca won the title after defeating Ethan Quinn 6–4, 6–4 in the final.

## Seeds

* Hugo Gaston (first round)
* Facundo Díaz Acosta (first round)
* Damir Džumhur (second round)
* Taro Daniel (first round)
* Sumit Nagal (first round)
* Jacob Fearnley (semifinals)
* Dominik Koepfer (first round)
* Mattia Bellucci (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Martín Landaluce | 3 | 3 | | | | |
| Q | Ethan Quinn | 6 | 6 | | | | |
| Q | Ethan Quinn | 6 | 6 | Q | Ethan Quinn | 4 | 4 |
| | | | | | João Fonseca | 6 | 6 |
| 6 | Jacob Fearnley | 3 | 3 | | João Fonseca | 6 | 6 |
| | João Fonseca | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | H Gaston | 2 | 2 | | | | | | | | | | | | | | |
| PR | Y Watanuki | 6 | 6 | | PR | Y Watanuki | 6 | 3 | 7$^7$ | | | | | | | | |
| LL | RA Burruchaga | 6 | 6 | | LL | RA Burruchaga | 3 | 6 | 6$^5$ | | | | | | | | |
| | J Faria | 3 | 3 | | | | | | | PR | Y Watanuki | | | | | | |
| | L Van Assche | 4 | 4 | | | | | | | | M Landaluce | w/o | | | | | |
| WC | D Sweeny | 6 | 6 | | WC | D Sweeny | 1 | 2 | | | | | | | | | |
| | M Landaluce | 6 | 6 | | | M Landaluce | 6 | 6 | | | | | | | | | |
| 8 | M Bellucci | 3 | 2 | | | | | | | | | | | | M Landaluce | 3 | 3 |
| 3 | D Džumhur | 7$^7$ | 6$^5$ | 6 | | | | | | | | | | Q | E Quinn | 6 | 6 |
| Q | H Habib | 6$^5$ | 7$^7$ | 2 | 3 | D Džumhur | 5 | 5 | | | | | | | | | |
| | V Kopřiva | 7$^7$ | 3 | 6 | | V Kopřiva | 7 | 7 | | | | | | | | | |
| Alt | M Krueger | 6$^5$ | 6 | 3 | | | | | | | V Kopřiva | 4 | 5 | | | | |
| WC | B Ellis | 6$^4$ | 6$^5$ | | | | | | | Q | E Quinn | 6 | 7 | | | | |
| Q | E Quinn | 7$^7$ | 7$^7$ | | Q | E Quinn | 3 | 7$^7$ | 6 | | | | | | | | |
| Q | P Kypson | 6 | 4 | 6 | Q | P Kypson | 6 | 6$^5$ | 4 | | | | | | | | |
| 5 | S Nagal | 2 | 6 | 1 | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | J Fearnley | 3 | 6 | 7 | | | | | | | | | | | | | |
| WC | Matthew Dellavedova | 6 | 4 | 5 | 6 | J Fearnley | 6 | 6 | | | | | | | | | |
| | J Kym | 6$^6$ | 6$^4$ | | Q | J Trotter | 2 | 4 | | | | | | | | | |
| Q | J Trotter | 7$^8$ | 7$^7$ | | | | | | 6 | J Fearnley | 4 | 6 | 7$^7$ | | | | |
| | C Eubanks | 6 | 7$^7$ | | | | | | | C Eubanks | 6 | 2 | 6$^3$ | | | | |
| | A Kovacevic | 3 | 6$^5$ | | | C Eubanks | 6 | 6 | | | | | | | | | |
| Q | A Galarneau | 7$^7$ | 6 | | Q | A Galarneau | 4 | 4 | | | | | | | | | |
| 4 | T Daniel | 6$^2$ | 2 | | | | | | | | | | | 6 | J Fearnley | 3 | 3 |
| 7 | D Koepfer | 4 | 4 | | | | | | | | | | | | J Fonseca | 6 | 6 |
| | H Mayot | 6 | 6 | | | H Mayot | 7$^7$ | 6 | | | | | | | | | |
| | DE Galán | 6 | 3 | 6 | | DE Galán | 6$^5$ | 4 | | | | | | | | | |
| | R Collignon | 2 | 6 | 2 | | | | | | H Mayot | 2 | 3 | | | | | |
| | M McDonald | 1 | 3 | | | | | | | J Fonseca | 6 | 6 | | | | | |
| | J Fonseca | 6 | 6 | | | J Fonseca | 6 | 7 | | | | | | | | | |
| | D Ajduković | 6 | 6 | | | D Ajduković | 1 | 5 | | | | | | | | | |
| 2 | F Díaz Acosta | 4 | 4 | | | | | | | | | | | | | | |